Frederick Ahrens in Verona Wisconsin area

Looking for any information on Frederick Ahrens his wife was Minna_____, their daughter was Bertha b: c1874 in Verona Wisconsin, (married in 1888 to Thomas McGregor in Missoula Mt, he was also born in Dane Wisconsin), Bertha had two sisters and two brother, at the time of her death in 1913. Mrs. L. C. Trump of Florence Mt (in 1929) and a brother Alfred, the other brothermight be Walter who married in 1908 (have wedding picture)Any information greatly appreciated, many photos.